Production of artificial yarns or threads



Patented Dec Q 1. .75 UNITED STATES PATENT OFFICE.

GUILLAULIE LABDY, OF YEAGE DE BOUSSILLON, CE ASSIGNOB TO SOCIETE POUR LA FABRICATION DELL 501E RHODIASETA, OI PARIS, FRANCE.

r'nonuc'rron or nn'rmrcmx. Years on 'rnnnnps.

no 11mm Application iuea A rn e, 1926, Serial in. 100,117, m in mm- April as, 1925.

In the textileindustry, the application of a fugitive dye to textile fibres is frequently resorted to in practice, for the purpose of conferring on said fibres a temporary coloration textile fibres of a different nature istinguished from one another, or

enablin tobe from textile fibres of the same nature,'- but possessing different characteristics, such as a.

difference of ade or-torsion, direction of twist, etc., or fibres of complex composition, obtained by assembling fibres of different natures orcharacteristics; this temporary coloration is subsequently removed when the moment is deemed suitable. This practice,'which, for the sake of simplicity, will be hereafter referredto as shading, is particularly important in view of the considerable extension ofithe use of artificial silk and of the appearance on the market of cellulose acetate'threads and fab-. rics.

This arises from the fact that artificial threads of different natures, even when they have diiferent qualities to the touch, or as their use, may occur with absolutely similar appearance, especially if these threads are, as

frequently happens, sized in viewof their subsequent use, or when they have "been wound on .supports such as reels or bobbins in view of their subsequent utilization in the manufacture of textile articles of all nature's.

This similitude in the appearance of the thread is apt to cause confusion and give rise to'mixtures' or" substitutions which are the more objectionable that threads of different chemical nature may have different susceptibilities-ti) the dyes employed. If then, a mixture or a substltution has taken place in the course of the manufacture of ,a fabric, the error may only be detected after dyeing and may resultin the necessity of dyeing again, or even in the rejection of the manufactured article. In any case, the error will cause a considerable depreciation of the final article.

It is therefore important that the shading should be carried outin such conditions that an absolute .certaintyis obtained that the totality of the thread subjected to. the,

operation is effectively shaded, and that this shading has, at every point along the thread,

a suficient intensity to ensure a perfect" sea curity from errors.

Until now, the operation of .shading has only been performed on finished threads, in hanks, or groups of hanks, or wound upon bobbins, which may give rise to irregularities in the shading, as the penetration of the dye may be incomplete inslde the skeins or bobbins. In fact, when the thread has been ut on spindles or spools, etc, it may happent at the visible iportlon of the thread is not shaded, or insu ciently so.

If, for instance, the operation is performed by dippingethe hanks in a colouring there may une ual shading of the high and low portions, un ess' repeated displacements of'the. thread are resorted to, a mani ulation which always affects adversely the su sequent operationsto which the thread is subjected. Similarly, if the shading be performed by spraying the hanks with a colouring solution, the layers of threads which rest onthe rods or other supports for the hanks partly escape the shading, unless mani ulations are resorted to, the purpose of whic is to renew the surfaces offered to spraying, which manipulations also present the'above inconven- 1ence. Applicant has now foun that it is possible to obtain this shadingof fiiaments, threads or other products obtained from any esters, ethers or cellulosic derivatives b the dry spinning process, b combining t is operation with the pr notion of these threads themselves, this shading being effected either on the elementary filaments before bath,

resulting directly or indirectly from the manipul'ation concerned;-

Finally,"it is, evident-that byimeans of the Q presentinvention, all the causes of irregularity of the shading mentioned above, are avoided. p j V The nature of the compounds br-mixtures of compounds used for obtaining this shading (dyes, colouring matters, extract of whatever origin, state or composition) and pastes, 'ellies, coatings, or even in the solid state; t ey may be used with or without the addition of any. bodies or mixtures of bodies intended tofacilitate the application of the shading or even, if desired to facilitate any subsequent treatment to which the prod-.

ucts'obtained may be submitted.

One can use for the application of these compounds any desired device, for instance,

the passage u on rolls, pads, or impregnated or soaked sur aces, passage through a trou h, atomization, spraying, or rubbing ont e product itself, alone or with the. addition of other bodies these devices being used alone,

or in other. a

The devices used. ma be either inside or outside the spinning cel or chambers; The filaments or threads of several such cells may be brou ht together on these devices in order to subm t them, either singly or together, to the shading on the same device, the threads being, if desired, subsequently separated.

groups or in combination with one an- In certain cases, the thread to be treated I ma be subjected to preliminary operations suc as drying, damping, wetting, heating,

etc, and afterwards .one may repeat theseoperations, or others, the latter of which may have for their purpose to. eliminate all or part of the constituents, to add others,

, or to cause the desired shading effect to appear or to fix this effect.

The present invention lends itself also to a special manner of shading for the dif-. ferentiation of textile fibres in the case when,

for instance, the number of dyes available is not suflicient' to differentiate a great variety of textile fibres of different or of the same nature, but on which has been conferred, or

it is intended to confer, different characteristigs (grade, twisting, direction of twisting, 4 g 3 v Systematic irregularities may then be introduced in the shading,- for instance, by shadin definite lengths of thread with spacin a so of definite length, or by sha ing definite lengths of thread alternately with different dyes, or still by shading with a dive a portion of the elementary filaments, 't e other elementary filaments not being, or being differently, coloured.

- It will be understood that these diverse means, which are easily carried out by a suitable adaptation of shading devices, a considerable diversity in the appearance'of the elementary together.

thread produced may'be attained with a small number of dyes. i The following examples are given in order to illustrate the invention better, it being well understood that the scope of the invention is by no means restricted to the applications mentioned in them: I

' Ewamle I Inthe spinning of a cellulosic ester by dry spinning, the elementary filaments or the threads composed of these filaments are caused to pass, during their production, upon a roll continuously impregnated with an aqueous solution containing 1% ,(more or less) of one of the following colouring matters: v

(St. Denis) Carmine blue (Schultz 5434 Colour Index 712) l V (B .S.F.) Brilliant carmine (Schultz 30 lour Index 357 v (C (Schultz (St. Denis) Amidonaphthol red (Schultz .M.G.) Brilliant-acid blue 507Colo\ir Index 672) 66Colour Index 57) I (C.N.M.G.)' Brilliant millin (Schultz 503Colour Index 667% (C.N.M.C.) Milling orange N. (The above colouring matters are onl given as an indication, and the dyes whic can be used are, of course, not limited to these) 7 Example II.

On threads similar to those mentioned in Example I, a solution of one of the dyes cited above,-or a solution containing in susgreen pension a mineral colour, such as ultramarine,

Guimet blue, red or yellow ochre, etc., is atomized and sprayed on the threads during their roduc'tion, for instance, between the exit 0 the spinning cell and thewinding dev1ce.-

-What I claim and'desire' to secure by Let- .ters Patent is :f-

1. A process consisting in imparting to filaments and threads obtained by the dry spinning ofcellulose derivatives a fugitive and temporary coloration for the purpose of differentiating' textile fibres havin different features, said coloration being app iedion the moving threads .in an operation combined" with the production of said threads.

2.? A process consisting in imparting to fila- I ments and threads obtained by the dry spinning'of cellulose derivatives a fugitive and rpose of diftemporary coloration for the pu ferentiating textile fibres havin difierent fear tures, said coloration be'inge acted on the filaments before they are joined 3. A process consisti n imparting to filaments and threads obtal'nedby the dryv spinning of cellulose derivatives a fugitive and temporary coloration for the purpose of difdenier b wholly or in part dyeing the artificial sil during or after the spinnin with a dye which is decolorized or remove completely or substantially completely by thev breaching process or any other after-treatment.

In testimony whereof I have signed my name to this specification.

.GUILLAUME LARDY.

CERTIFICATE or CORRECTION.

Patent No. 1,693,759.

Granted December 4, 1928, to

GU ILLAUME LARDY.

it is hereby certified that error appears in the prin'ted specification of the above numberedpatent requiring correction as follows:

Page 3, line 14, claim .4, for. the misspelled word "breaching" read "bleaching"; same page, after line 15, insert the following as .claim 5:

"5. A process which comprises dyeing filaments and threads obtained .by. the dry spinning of cellulose derivatives with a dyestui-f capable of I ready removal or'discoloration for the purpose of differentiating textile fibres having different features, said dyeing being effected on the moving threads in the operation combined with the production of said threads".;

and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office Signed and sealed this-28th day of May, A. D. 1929.

M. J. Moore,

Acting Commissioner of Patents. 

